package common;

import java.text.DecimalFormat;

//公共类
public class Common {
    //double类型格式化
    public static String dataFormat(double data){
        DecimalFormat formatData=new DecimalFormat("#.0");
        return formatData.format(data);
    }
    //double类型两数相减
   public static double sub(double num1,double num2){
        return (num1*10-num2*10)/10;
   }

}
